Dynamic and molecular association in premicellar aqueous solutions of dicarboxylate amino acid-based surfactant as studied by 1 H NMR.
Magn Reson Chem
; 60(3): 359-368, 2022 03.
Article
em En
| MEDLINE
| ID: mdl-34596264
ABSTRACT
We examined a series of amino acid-based surfactants with two carboxylic groups separated by a spacer of one, two, or three carbon atoms with sodium and calcium counterions in the premicellar concentration region near the CMC. 1 H nuclear magnetic resonance (NMR) spectroscopy and NMR diffusometry techniques were used to study the local environment, association, and translational dynamics of the surfactant's molecules. We measured the self-diffusion coefficients of the micelles, calculated the effective hydrodynamic radii, and determined the temperature region in which the premicelles exist. With an increase in temperature from 295 to 335 K, the premicellar state of the surfactant is replaced by the monomeric state.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tensoativos
/
Aminoácidos
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Magn Reson Chem
Assunto da revista:
QUIMICA
Ano de publicação:
2022
Tipo de documento:
Article